Chair

Abstract

A chair ( 1 ) has a base ( 2 ) and upwardly projecting from the base ( 2 ) a supporting column ( 6 ) holding a seating device ( 7 ). Disposed on the base ( 2 ) is a plug-type connection piece ( 19 ). The supporting column ( 6 ) is slipped onto the onto the plug-type connection piece ( 19 ) and secured on the plug-type connection piece ( 19 ) in a manner so that it is detachable from the outside.

What is claimed is:  
     
       1. A chair having a base and a supporting column upwardly projecting from this base to hold a seating device, specifically in a vertically adjustable manner, characterized in that 
       the base ( 2 ) has disposed on it a plug-type connection piece ( 19 ) and the supporting column ( 6 ) is slipped onto this plug-type connection piece ( 19 ), said supporting column being secured on the plug-type connection piece ( 19 ) in such a way that it is detachable from the outside,  
       the supporting column ( 6 ) is secured on the plug-type connection piece ( 19 ) by bracing means ( 21 ) that are supported on the supporting column ( 6 ) and extend through the same, and that engage by contact to the plug-type connection piece ( 19 ) and brace the same to the inside of the supporting column ( 6 ), and  
       the bracing means ( 21 ) are formed by at least one tightening screw ( 22 ) that pushes against the plug-type connection piece ( 19 ).  
     
     
       2. A chair according to  claim 1 , characterized in that the plug-type connection piece ( 19 ) is a bent sheet metal component. 
     
     
       3. A chair according to  claim 1 , characterized in that the bracing means ( 21 ) engage by contact to the plug-type connection piece ( 19 ) from one side, and the plug-type connection piece ( 19 ) has, in its end region ( 25 ) opposite the side ( 24 ) contacted by the bracing means ( 21 ), a shape that tapers in cross section toward its end, and the inside of the supporting column ( 6 ) tapers in a similar way, so that the plug-type connection piece ( 19 ) becomes wedged inside the supporting column ( 6 ) during the bracing process. 
     
     
       4. A chair according to  claim 1  or  3 , characterized in that the plug-type connection means is hollow and the bracing means ( 21 ) engage by contact to the plug-type connection piece ( 19 ) from one side and the plug-type connection piece ( 19 ) has, on its contacted side ( 24 ), a wall section ( 30 ,  31 ) to both sides of the bracing means ( 21 ) that is slanted or curved in cross section, so that when the bracing means ( 21 ) are in operation, the plug-type connection piece ( 19 ) is pushed against the inside of the supporting column on both sides of the bracing means ( 21 ) due to a spreading effect. 
     
     
       5. A chair according to  claim 4 , characterized in that sides ( 35 ,  36 ) of the plug-type connection piece ( 19 ) that extend from the contacted side ( 24 ) to the opposite end region ( 25 ) of the plug-type connection piece ( 19 ) are convex in their center region ( 37 ,  38 ), so that a space is created facing wall sections ( 41 ,  42 ) of the supporting column ( 6 ). 
     
     
       6. A chair according to  claim 3 , characterized in that the supporting column ( 6 ) has an essentially oval or elliptical cross section, with the bracing means ( 21 ) supported on one of the main apexes. 
     
     
       7. A chair according to  claim 4 , characterized in that the plug-type connection piece ( 19 ) is slotted longitudinally on its contacted side ( 24 ) in the height direction. 
     
     
       8. A chair according to  claim 7 , characterized in that sides ( 35 ,  36 ) of the plug-type connection piece ( 19 ) that extend from the contacted side ( 24 ) to the opposite end region ( 25 ) of the plug-type connection piece ( 19 ) are convex in their center region ( 37 ,  38 ), so that a space is created facing wall sections ( 41 ,  42 ) of the supporting column ( 6 ). 
     
     
       9. A chair according to  claim 8 , characterized in that the supporting column ( 6 ) has an essentially oval or elliptical cross section, with the bracing means ( 21 ) supported on one of the main apexes. 
     
     
       10. A chair according to  claim 9 , characterized in that the bracing means ( 21 ) are formed by at least one tightening screw ( 22 ) that pushes against the plug-type connection piece ( 19 ). 
     
     
       11. A chair according to  claim 10 , characterized in that the plug-type connection piece ( 19 ) is a bent sheet metal component. 
     
     
       12. A chair having a base and a supporting column upwardly projecting from this base to hold a seating device, specifically in a vertically adjustable manner, characterized in that 
       the base ( 2 ) has disposed on it a plug-type connection piece ( 19 ) and the supporting column ( 6 ) is slipped onto this plug-type connection piece ( 19 ), said supporting column being secured on the plug-type connection piece ( 19 ) in such a way that it is detachable from the outside,  
       the supporting column ( 6 ) is secured on the plug-type connection piece ( 19 ) by bracing means ( 21 ) that are supported on the supporting column ( 6 ) and extend through the same, and that engage by contact to the plug-type connection piece ( 19 ) and brace the same to the inside of the supporting column ( 6 ),  
       the bracing means ( 21 ) engage by contact to the plug-type connection piece ( 19 ) from one side, and the plug-type connection piece ( 19 ) has, in its end region ( 25 ) opposite the side ( 24 ) contacted by the bracing means ( 21 ), a shape that tapers in cross section toward its end, and the inside of the supporting column ( 6 ) tapers in a similar way, so that the plug-type connection piece ( 19 ) becomes wedged inside the supporting column ( 6 ) during the bracing process, and  
       the supporting column ( 6 ) has an essentially oval or elliptical cross section, with the bracing means ( 21 ) supported on one of the main apexes.  
     
     
       13. A chair having a base and a supporting column upwardly projecting from this base to hold a seating device, specifically in a vertically adjustable manner, characterized in that the base ( 2 ) has disposed on it a plug-type connection piece ( 19 ) and the supporting column ( 6 ) is slipped onto this plug-type connection piece ( 19 ), said supporting column being secured on the plug-type connection piece ( 19 ) in such a way that it is detachable from the outside, 
       the supporting column ( 6 ) is secured on the plug-type connection piece ( 19 ) by means of bracing means ( 21 ) that are supported on the supporting column ( 6 ) and extend through the same, and that engage by contact to the plug-type connection piece ( 19 ) and brace the same to the inside of the supporting column ( 6 ),  
       the plug-type connection piece ( 19 ) is slotted longitudinally on its contacted side ( 24 ) in the height direction, and  
       wherein sides ( 35 ,  36 ) of the plug-type connection piece ( 19 ) that extend from the contacted side ( 24 ) to the opposite end region ( 25 ) of the plug-type connection piece ( 19 ) are convex in their center region ( 37 ,  38 ), so that a space is created facing wall sections ( 41 ,  42 ) of the supporting column ( 6 ).